X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/TopScoreDocCollector.java diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/TopScoreDocCollector.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/TopScoreDocCollector.java deleted file mode 100644 index f335e3d..0000000 --- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/search/TopScoreDocCollector.java +++ /dev/null @@ -1,171 +0,0 @@ -package org.apache.lucene.search; - -/** - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -import java.io.IOException; - -import org.apache.lucene.index.IndexReader; - -/** - * A {@link Collector} implementation that collects the top-scoring hits, - * returning them as a {@link TopDocs}. This is used by {@link IndexSearcher} to - * implement {@link TopDocs}-based search. Hits are sorted by score descending - * and then (when the scores are tied) docID ascending. When you create an - * instance of this collector you should know in advance whether documents are - * going to be collected in doc Id order or not. - * - *
NOTE: The values {@link Float#NaN} and
- * {Float#NEGATIVE_INFINITY} are not valid scores. This
- * collector will not properly collect hits with such
- * scores.
- */
-public abstract class TopScoreDocCollector extends TopDocsCollector NOTE: The instances returned by this method
- * pre-allocate a full array of length
- * numHits
, and fill the array with sentinel
- * objects.
- */
- public static TopScoreDocCollector create(int numHits, boolean docsScoredInOrder) {
-
- if (numHits <= 0) {
- throw new IllegalArgumentException("numHits must be > 0; please use TotalHitCountCollector if you just need the total hit count");
- }
-
- if (docsScoredInOrder) {
- return new InOrderTopScoreDocCollector(numHits);
- } else {
- return new OutOfOrderTopScoreDocCollector(numHits);
- }
-
- }
-
- ScoreDoc pqTop;
- int docBase = 0;
- Scorer scorer;
-
- // prevents instantiation
- private TopScoreDocCollector(int numHits) {
- super(new HitQueue(numHits, true));
- // HitQueue implements getSentinelObject to return a ScoreDoc, so we know
- // that at this point top() is already initialized.
- pqTop = pq.top();
- }
-
- @Override
- protected TopDocs newTopDocs(ScoreDoc[] results, int start) {
- if (results == null) {
- return EMPTY_TOPDOCS;
- }
-
- // We need to compute maxScore in order to set it in TopDocs. If start == 0,
- // it means the largest element is already in results, use its score as
- // maxScore. Otherwise pop everything else, until the largest element is
- // extracted and use its score as maxScore.
- float maxScore = Float.NaN;
- if (start == 0) {
- maxScore = results[0].score;
- } else {
- for (int i = pq.size(); i > 1; i--) { pq.pop(); }
- maxScore = pq.pop().score;
- }
-
- return new TopDocs(totalHits, results, maxScore);
- }
-
- @Override
- public void setNextReader(IndexReader reader, int base) {
- docBase = base;
- }
-
- @Override
- public void setScorer(Scorer scorer) throws IOException {
- this.scorer = scorer;
- }
-}